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Well test analysis control system and method used for horizontal well subsection liquid producing identification

A technology of control system and control method, applied in wellbore/well components, earthwork drilling, surveying, etc.

Active Publication Date: 2015-05-13
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems encountered in the development, evaluation and stimulation of staged liquid-producing horizontal wells in the prior art pointed out in the above-mentioned prior art, the present invention provides a well testing analysis control system for staged liquid-producing horizontal wells and methods

Method used

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  • Well test analysis control system and method used for horizontal well subsection liquid producing identification
  • Well test analysis control system and method used for horizontal well subsection liquid producing identification
  • Well test analysis control system and method used for horizontal well subsection liquid producing identification

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Embodiment 1

[0041] figure 1 It is a flow chart of the well test analysis and control method for a staged liquid producing horizontal well in an embodiment of the present invention. The method in the embodiment of the present invention considers the influence of the staged liquid production of a horizontal well. The method includes the following steps:

[0042]101: Measure the bottomhole pressure value of a horizontal well during shutting down for a period of time, and obtain the relationship between the pressure difference and time, that is, the pressure solution;

[0043] According to an embodiment of the present invention, the relationship includes a pressure difference versus time relationship and a derivative of the pressure difference versus time relationship.

[0044] According to the measurement step, the bottom hole pressure value of the horizontal well is obtained. How to obtain the various parameters of the horizontal well according to the bottom hole pressure value, so as to di...

Embodiment 2

[0091] figure 2 It is a block diagram of a horizontal well testing analysis control system according to an embodiment of the present invention. The system mainly includes a horizontal well pressure measurement unit 21, a judging unit 22, a well testing interpretation parameter processing unit 23, and a well testing analysis control unit 24, wherein:

[0092] The horizontal well pressure measurement unit 21 is used to measure the bottom hole pressure value of a horizontal well during shut-in for a period of time, and obtain the relationship between the pressure difference and time, that is, the pressure solution. The relationship may include a pressure difference versus time relationship and a derivative of the pressure difference versus time relationship.

[0093]According to the embodiment of the present invention, the horizontal well pressure measurement unit 21 can be realized by a commonly used reservoir pressure measurement unit or measurement device, and the measurement...

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Abstract

The invention relates to a well test analysis control system and method used for horizontal well subsection liquid producing identification. The method includes the following steps that a bottom hole pressure value of a horizontal well in the well shut-in period is measured, and the relation value between a pressure difference and time is obtained; whether the relation value is equal to a preset relation value or not is judged, if yes, the next step is performed, and if not, well test interpretation parameters corresponding to the preset relation value are corrected; the well test interpretation parameters corresponding to the preset relation value serve as well test interpretation parameters of the horizontal well; according to the well test interpretation parameters of the horizontal well, the liquid producing condition of the well is analyzed so that development of the horizontal well can be optimized; the well test interpretation parameters comprise the horizontal well liquid producing section number, the position of each liquid producing section, the length of each liquid producing section, the skin factor of each liquid producing segment, the permeability and a shaft storage coefficient. Horizontal well test interpretation performed through the method accords to the actual condition of an oil reservoir better, and an accurate basis is provided for liquid producing well section diagnosis and interpretation and well stimulation making of the horizontal well.

Description

technical field [0001] The invention relates to the field of well test analysis for oilfield development, in particular to a well test analysis control system and method for segmental liquid production identification of horizontal wells. Background technique [0002] Horizontal wells have important strategic significance and practical benefits in terms of increasing recoverable reserves, increasing production, reducing production costs, and developing complex reservoirs. Therefore, evaluation of development effects and stimulation of horizontal wells have become a research hotspot for reservoir engineers. Well testing is a technology to understand the formation characteristics in the process of modern reservoir development. Well testing analysis is to obtain real-time static and dynamic parameters of the formation through the analysis of the bottom hole pressure change, such as formation permeability, skin coefficient, well storage coefficient, Boundaries, etc., thus providi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/06E21B49/00
CPCE21B47/00E21B47/06E21B49/00
Inventor 程时清刘斌李双于海洋何佑伟
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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